Door-check.



No. 832,420. PATENTED 0GT.2,119O6.

B. s. RINALDY. DOORHCHEGK.

APPLICATION FILED 0053.31, 1905.

l UNITED sTATns PATENT OFFIOE.

Specification of Letters Patent.

I Patented oct. 2, 190e.

Application filed October 31, 1905. Serial No. 285,303.

T0 all whom it may concern,.-

Be it known that I, EDWARD S. RINALDY, a citizen of the United States,residing in the borough of Brooklyn, in the county of Kings and city andState of New York, have invented certain new and useful Improvements inDoor-Checks, of which the following is a specication.

The ordinary door-chain in common 'use in cityl houses usually consistsof a short chain secured by a staple to the bolted or xed door of doubledoors and provided at its free end with a T-piece which may be made toengage a slotted metal socket secured to the other door which is usedJfor admission. When the chain is in use, the last-named door may beopened a little wa y, but not to an extent su'l'licient to admit anyone. It sometimes happens that the chain is inadvertently put up atnight when a person having a latch-key is out, and it is desirable thathe should be able with his latch-key or with another key to detach thechain, and thus gain admission.

The present invention has for its object to provide for such acontingency, and it consists, in substance, in substituting for theusual staple to which the fixed end of the chain is secured a bolt whichsecures the chain and a lock whereby through the aid of a key this boltmay be so moved as to detach the chain and permit it to fall free. Anysuitable kind of lock and key may be employed, and it is preferred thatthe bolt shall have a spring to hold it in its operative position. It isalso desirable that the bolt shall have a knob or the like whereby itcan be drawn back or out by hand by any one inside the house forreplacing the chain after its release. Devices for eiiiecting thisobject have been employed or proposed, but so far as I am aware theyhave required a special construction of all the parts. My object is toaccomplish the purpose with the ordinary door-chain and slotted socketwhich are kept in stock by dealers and to combine with this a specialdetaching means for that end of the chain which is usually secured, thedevice or means for detaching being a bolt and the parts so disposedthat the chain will fall i'ree by gravity when said bolt is withdrawn.

In the accompanying drawings, which illustrate an embodiment oftheinvention, Figure l is a view of the device on the doors as seen frominside the house. This view shows only a part of each door. Fig. 2 is asectional view of the locking device on a larger scale than Fig. 1, theplane ofthe section being indicated by line :1:2 in Fig. 3. Fig. 13 ilsa section taken through the door, and

A designates what may be called the iixed door, which is usually boltedat top and bottom, and B the admission-door, or that which carries theknob K and the doorlatch. C is the chain, and S the slotted socket whichreceives the T-piece T on the chain. These may all be of the usual kind.

On the inner Jface of the iixed door A at the proper point is mounted abolt-casing 1, in which is mounted a bolt 2, provided with a spring 3and a head or knob 4 on its exterior end. There is a slot 5 in thebolt-casing for the insertion of the end link c of the chain and asocket 6 to engage the end of the bolt after it shall ha ve passedthrough said link. Pins 7 in the bolt take under the lower end of thespring 3.

Obviously the bolt may be withdrawn from its socket 6 and the chain bereleased by means of the knob or other thumb-piece 4 thereon; but thiscan be done only by a person inside the house. It must be understoodthat the thumb-piece 4, or, indeed, any other means for withdrawing thebolt 2 by hand, is not at all essential to the invention.

In order to enable any one outside to withdraw the bolt and release thechain, a lock L, Fig. 3, is set in the door with access for a key lcfrom the outside, and this lock has a spindle 8, rotatable by the properkey. This spindle projects through the door into the bolt-casing 1,where it is provided with an arm 9, which is forked to embrace the bolt2 and take under the pins 7. By means of this arm the rotation oi thelock-spindle is caused to withdraw the bolt and release the chain. Thebolt-spring 3 returns the arm and spindle to their normal position whenthe rotative power applied to the key 7c is removed.

Obviously the present invention is not restricted to any special form oflock. That herein shown is of the Yale type. So long as the constructionprovides an intermediary between the key and the bolt 2, whereby theformer is enabled to withdraw the latter, the required conditions willbe uliilled.

As herein shown, the bolt-casing and bolt are so disposed that the boltis displaced or withdrawn by an upward movement; but this is not veryimportant. Obviously the IOO IIO

special key.

case may be so set that the withdrawal movement of the bolt is downward,horizontal, or inclined. The only essential is that the case shall1 beso set that the weight of the chain will withdraw the link c from thelHaving thus described my invention, I claim- 1. The combination with achain and slotted socket, of a bolt-casing provided with a sliding boltin position to engage the end I link of the chain, the casing having aflared slot to receive said link, a lock rovided with means forwithdrawing said bo t and releasing said/link, and the key of said lock,adapted to actuate said bolt-withdrawing means.

2. The combination, with the fixed slotted socket S, and the chain C,provided at one end with a T-piece which slidably engages said socket,of the fixed bolt-casing 1, having in it a flared slot 5, the sring-bolt 2, mounted in said casing and a apted to engage the terminallink c of the chain, a fixed lock adjacent to the casing l and providedwith a mechanism for withdrawing said bolt 2, and a key for operatingthe lockl mechanism.

In witness whereof I have hereunto signed my name, this 26th day ofOctober, 1905, in the presence of two subscribing witnesses.

EDWARD Si RINALDY.

